libstdc++
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Public Types | |
enum class | _Construct { _Token } |
Public Member Functions | |
constexpr | nullopt_t (_Construct) noexcept |
Tag type to disengage optional objects.
Definition at line 68 of file std/optional.
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strong |
Definition at line 75 of file std/optional.
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inlineexplicitconstexprnoexcept |
Definition at line 78 of file std/optional.